content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * --------------------
   * FastScatterPlot.java
   * --------------------
   * (C) Copyright 2002-2012, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   Arnaud Lelievre;
   *
   * Changes
   * -------
   * 29-Oct-2002 : Added standard header (DG);
   * 07-Nov-2002 : Fixed errors reported by Checkstyle (DG);
   * 26-Mar-2003 : Implemented Serializable (DG);
   * 19-Aug-2003 : Implemented Cloneable (DG);
   * 08-Sep-2003 : Added internationalization via use of properties
   *               resourceBundle (RFE 690236) (AL);
   * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
   * 12-Nov-2003 : Implemented zooming (DG);
   * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
   * 26-Jan-2004 : Added domain and range grid lines (DG);
   * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState (DG);
   * 29-Sep-2004 : Removed hard-coded color (DG);
   * 04-Oct-2004 : Reworked equals() method and renamed ArrayUtils
   *               --> ArrayUtilities (DG);
   * 12-Nov-2004 : Implemented the new Zoomable interface (DG);
   * 05-May-2005 : Updated draw() method parameters (DG);
   * 16-Jun-2005 : Added get/setData() methods (DG);
   * ------------- JFREECHART 1.0.x ---------------------------------------------
   * 10-Nov-2006 : Fixed bug 1593150, by not allowing null axes, and added
   *               setDomainAxis() and setRangeAxis() methods (DG);
   * 24-Sep-2007 : Implemented new zooming methods (DG);
   * 25-Mar-2008 : Make use of new fireChangeEvent() method (DG);
   * 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
   *               Jess Thrysoee (DG);
   * 26-Mar-2009 : Implemented Pannable, and fixed bug in zooming (DG);
   * 15-Jun-2012 : Remove JCommon dependencies (DG);
   *
   */
  
  package org.jfree.chart.plot;
  
  import java.awt.AlphaComposite;
  import java.awt.BasicStroke;
  import java.awt.Color;
  import java.awt.Composite;
  import java.awt.Graphics2D;
  import java.awt.Paint;
  import java.awt.Shape;
  import java.awt.Stroke;
  import java.awt.geom.Line2D;
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  import java.util.List;
  import java.util.ResourceBundle;
  
  import org.jfree.chart.axis.AxisSpace;
  import org.jfree.chart.axis.AxisState;
  import org.jfree.chart.axis.NumberAxis;
  import org.jfree.chart.axis.ValueAxis;
  import org.jfree.chart.axis.ValueTick;
  import org.jfree.chart.ui.RectangleEdge;
  import org.jfree.chart.ui.RectangleInsets;
  import org.jfree.chart.util.ArrayUtilities;
  import org.jfree.chart.util.ObjectUtilities;
  import org.jfree.chart.util.PaintUtilities;
  import org.jfree.chart.event.PlotChangeEvent;
  import org.jfree.chart.util.ResourceBundleWrapper;
  import org.jfree.chart.util.SerialUtilities;
  import org.jfree.data.Range;
  
  /**
   * A fast scatter plot.
   */
  public class FastScatterPlot extends Plot implements ValueAxisPlot, Pannable,
          Zoomable, Cloneable, Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = 7871545897358563521L;
  
      /** The default grid line stroke. */
      public static final Stroke DEFAULT_GRIDLINE_STROKE = new BasicStroke(0.5f,
              BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0.0f, new float[]
              {2.0f, 2.0f}, 0.0f);
  
      /** The default grid line paint. */
      public static final Paint DEFAULT_GRIDLINE_PAINT = Color.LIGHT_GRAY;
  
      /** The data. */
      private float[][] data;
  
      /** The x data range. */
      private Range xDataRange;
  
      /** The y data range. */
      private Range yDataRange;
  
      /** The domain axis (used for the x-values). */
      private ValueAxis domainAxis;
  
      /** The range axis (used for the y-values). */
      private ValueAxis rangeAxis;
  
      /** The paint used to plot data points. */
      private transient Paint paint;
  
      /** A flag that controls whether the domain grid-lines are visible. */
      private boolean domainGridlinesVisible;
  
      /** The stroke used to draw the domain grid-lines. */
      private transient Stroke domainGridlineStroke;
  
      /** The paint used to draw the domain grid-lines. */
      private transient Paint domainGridlinePaint;
  
      /** A flag that controls whether the range grid-lines are visible. */
      private boolean rangeGridlinesVisible;
  
      /** The stroke used to draw the range grid-lines. */
      private transient Stroke rangeGridlineStroke;
  
      /** The paint used to draw the range grid-lines. */
      private transient Paint rangeGridlinePaint;
  
      /**
       * A flag that controls whether or not panning is enabled for the domain
       * axis.
       *
       * @since 1.0.13
       */
      private boolean domainPannable;
  
      /**
       * A flag that controls whether or not panning is enabled for the range
       * axis.
       *
       * @since 1.0.13
       */
      private boolean rangePannable;
  
      /** The resourceBundle for the localization. */
      protected static ResourceBundle localizationResources
              = ResourceBundleWrapper.getBundle(
              "org.jfree.chart.plot.LocalizationBundle");
  
      /**
       * Creates a new instance of <code>FastScatterPlot</code> with default
       * axes.
       */
      public FastScatterPlot() {
          this(null, new NumberAxis("X"), new NumberAxis("Y"));
      }
  
      /**
       * Creates a new fast scatter plot.
       * <p>
       * The data is an array of x, y values:  data[0][i] = x, data[1][i] = y.
       *
       * @param data  the data (<code>null</code> permitted).
       * @param domainAxis  the domain (x) axis (<code>null</code> not permitted).
       * @param rangeAxis  the range (y) axis (<code>null</code> not permitted).
       */
      public FastScatterPlot(float[][] data,
                             ValueAxis domainAxis, ValueAxis rangeAxis) {
  
          super();
          if (domainAxis == null) {
              throw new IllegalArgumentException("Null 'domainAxis' argument.");
          }
          if (rangeAxis == null) {
              throw new IllegalArgumentException("Null 'rangeAxis' argument.");
          }
  
          this.data = data;
          this.xDataRange = calculateXDataRange(data);
          this.yDataRange = calculateYDataRange(data);
          this.domainAxis = domainAxis;
          this.domainAxis.setPlot(this);
          this.domainAxis.addChangeListener(this);
          this.rangeAxis = rangeAxis;
          this.rangeAxis.setPlot(this);
          this.rangeAxis.addChangeListener(this);
  
          this.paint = Color.RED;
  
          this.domainGridlinesVisible = true;
          this.domainGridlinePaint = FastScatterPlot.DEFAULT_GRIDLINE_PAINT;
          this.domainGridlineStroke = FastScatterPlot.DEFAULT_GRIDLINE_STROKE;
  
          this.rangeGridlinesVisible = true;
          this.rangeGridlinePaint = FastScatterPlot.DEFAULT_GRIDLINE_PAINT;
          this.rangeGridlineStroke = FastScatterPlot.DEFAULT_GRIDLINE_STROKE;
  
      }
  
      /**
       * Returns a short string describing the plot type.
       *
       * @return A short string describing the plot type.
       */
      @Override
      public String getPlotType() {
          return localizationResources.getString("Fast_Scatter_Plot");
      }
  
      /**
       * Returns the data array used by the plot.
       *
       * @return The data array (possibly <code>null</code>).
       *
       * @see #setData(float[][])
       */
      public float[][] getData() {
          return this.data;
      }
  
      /**
       * Sets the data array used by the plot and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param data  the data array (<code>null</code> permitted).
       *
       * @see #getData()
       */
      public void setData(float[][] data) {
          this.data = data;
          fireChangeEvent();
      }
  
      /**
       * Returns the orientation of the plot.
       *
       * @return The orientation (always {@link PlotOrientation#VERTICAL}).
       */
      @Override
      public PlotOrientation getOrientation() {
          return PlotOrientation.VERTICAL;
      }
  
      /**
       * Returns the domain axis for the plot.
       *
       * @return The domain axis (never <code>null</code>).
       *
       * @see #setDomainAxis(ValueAxis)
       */
      public ValueAxis getDomainAxis() {
          return this.domainAxis;
      }
  
      /**
       * Sets the domain axis and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param axis  the axis (<code>null</code> not permitted).
       *
       * @since 1.0.3
       *
       * @see #getDomainAxis()
       */
      public void setDomainAxis(ValueAxis axis) {
          if (axis == null) {
              throw new IllegalArgumentException("Null 'axis' argument.");
          }
          this.domainAxis = axis;
          fireChangeEvent();
      }
  
      /**
       * Returns the range axis for the plot.
       *
       * @return The range axis (never <code>null</code>).
       *
       * @see #setRangeAxis(ValueAxis)
       */
      public ValueAxis getRangeAxis() {
          return this.rangeAxis;
      }
  
      /**
       * Sets the range axis and sends a {@link PlotChangeEvent} to all
       * registered listeners.
       *
       * @param axis  the axis (<code>null</code> not permitted).
       *
       * @since 1.0.3
       *
       * @see #getRangeAxis()
       */
      public void setRangeAxis(ValueAxis axis) {
          if (axis == null) {
              throw new IllegalArgumentException("Null 'axis' argument.");
          }
          this.rangeAxis = axis;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint used to plot data points.  The default is
       * <code>Color.RED</code>.
       *
       * @return The paint.
       *
       * @see #setPaint(Paint)
       */
      public Paint getPaint() {
          return this.paint;
      }
  
      /**
       * Sets the color for the data points and sends a {@link PlotChangeEvent}
       * to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getPaint()
       */
      public void setPaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.paint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>true</code> if the domain gridlines are visible, and
       * <code>false</code> otherwise.
       *
       * @return <code>true</code> or <code>false</code>.
       *
       * @see #setDomainGridlinesVisible(boolean)
       * @see #setDomainGridlinePaint(Paint)
       */
      public boolean isDomainGridlinesVisible() {
          return this.domainGridlinesVisible;
      }
  
      /**
       * Sets the flag that controls whether or not the domain grid-lines are
       * visible.  If the flag value is changed, a {@link PlotChangeEvent} is
       * sent to all registered listeners.
       *
       * @param visible  the new value of the flag.
       *
       * @see #getDomainGridlinePaint()
       */
      public void setDomainGridlinesVisible(boolean visible) {
          if (this.domainGridlinesVisible != visible) {
              this.domainGridlinesVisible = visible;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the stroke for the grid-lines (if any) plotted against the
       * domain axis.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @see #setDomainGridlineStroke(Stroke)
       */
      public Stroke getDomainGridlineStroke() {
          return this.domainGridlineStroke;
      }
  
      /**
       * Sets the stroke for the grid lines plotted against the domain axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> not permitted).
       *
       * @see #getDomainGridlineStroke()
       */
      public void setDomainGridlineStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.domainGridlineStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint for the grid lines (if any) plotted against the domain
       * axis.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setDomainGridlinePaint(Paint)
       */
      public Paint getDomainGridlinePaint() {
          return this.domainGridlinePaint;
      }
  
      /**
       * Sets the paint for the grid lines plotted against the domain axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getDomainGridlinePaint()
       */
      public void setDomainGridlinePaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.domainGridlinePaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Returns <code>true</code> if the range axis grid is visible, and
       * <code>false</code> otherwise.
       *
       * @return <code>true</code> or <code>false</code>.
       *
       * @see #setRangeGridlinesVisible(boolean)
       */
      public boolean isRangeGridlinesVisible() {
          return this.rangeGridlinesVisible;
      }
  
      /**
       * Sets the flag that controls whether or not the range axis grid lines are
       * visible.  If the flag value is changed, a {@link PlotChangeEvent} is
       * sent to all registered listeners.
       *
       * @param visible  the new value of the flag.
       *
       * @see #isRangeGridlinesVisible()
       */
      public void setRangeGridlinesVisible(boolean visible) {
          if (this.rangeGridlinesVisible != visible) {
              this.rangeGridlinesVisible = visible;
              fireChangeEvent();
          }
      }
  
      /**
       * Returns the stroke for the grid lines (if any) plotted against the range
       * axis.
       *
       * @return The stroke (never <code>null</code>).
       *
       * @see #setRangeGridlineStroke(Stroke)
       */
      public Stroke getRangeGridlineStroke() {
          return this.rangeGridlineStroke;
      }
  
      /**
       * Sets the stroke for the grid lines plotted against the range axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param stroke  the stroke (<code>null</code> permitted).
       *
       * @see #getRangeGridlineStroke()
       */
      public void setRangeGridlineStroke(Stroke stroke) {
          if (stroke == null) {
              throw new IllegalArgumentException("Null 'stroke' argument.");
          }
          this.rangeGridlineStroke = stroke;
          fireChangeEvent();
      }
  
      /**
       * Returns the paint for the grid lines (if any) plotted against the range
       * axis.
       *
       * @return The paint (never <code>null</code>).
       *
       * @see #setRangeGridlinePaint(Paint)
       */
      public Paint getRangeGridlinePaint() {
          return this.rangeGridlinePaint;
      }
  
      /**
       * Sets the paint for the grid lines plotted against the range axis and
       * sends a {@link PlotChangeEvent} to all registered listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getRangeGridlinePaint()
       */
      public void setRangeGridlinePaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.rangeGridlinePaint = paint;
          fireChangeEvent();
      }
  
      /**
       * Draws the fast scatter plot on a Java 2D graphics device (such as the
       * screen or a printer).
       *
       * @param g2  the graphics device.
       * @param area   the area within which the plot (including axis labels)
       *                   should be drawn.
       * @param anchor  the anchor point (<code>null</code> permitted).
       * @param parentState  the state from the parent plot (ignored).
       * @param info  collects chart drawing information (<code>null</code>
       *              permitted).
       */
      @Override
      public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor,
                       PlotState parentState,
                       PlotRenderingInfo info) {
  
          // set up info collection...
          if (info != null) {
              info.setPlotArea(area);
          }
  
          // adjust the drawing area for plot insets (if any)...
          RectangleInsets insets = getInsets();
          insets.trim(area);
  
          AxisSpace space = new AxisSpace();
          space = this.domainAxis.reserveSpace(g2, this, area,
                  RectangleEdge.BOTTOM, space);
          space = this.rangeAxis.reserveSpace(g2, this, area, RectangleEdge.LEFT,
                  space);
          Rectangle2D dataArea = space.shrink(area, null);
  
          if (info != null) {
              info.setDataArea(dataArea);
          }
  
          // draw the plot background and axes...
          drawBackground(g2, dataArea);
  
          AxisState domainAxisState = this.domainAxis.draw(g2,
                  dataArea.getMaxY(), area, dataArea, RectangleEdge.BOTTOM, info);
          AxisState rangeAxisState = this.rangeAxis.draw(g2, dataArea.getMinX(),
                  area, dataArea, RectangleEdge.LEFT, info);
          drawDomainGridlines(g2, dataArea, domainAxisState.getTicks());
          drawRangeGridlines(g2, dataArea, rangeAxisState.getTicks());
  
          Shape originalClip = g2.getClip();
          Composite originalComposite = g2.getComposite();
  
          g2.clip(dataArea);
          g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
                  getForegroundAlpha()));
  
          render(g2, dataArea, info, null);
  
          g2.setClip(originalClip);
          g2.setComposite(originalComposite);
          drawOutline(g2, dataArea);
  
      }
  
      /**
       * Draws a representation of the data within the dataArea region.  The
       * <code>info</code> and <code>crosshairState</code> arguments may be
       * <code>null</code>.
       *
       * @param g2  the graphics device.
       * @param dataArea  the region in which the data is to be drawn.
       * @param info  an optional object for collection dimension information.
       * @param crosshairState  collects crosshair information (<code>null</code>
       *                        permitted).
       */
      public void render(Graphics2D g2, Rectangle2D dataArea,
                         PlotRenderingInfo info, CrosshairState crosshairState) {
  
  
          //long start = System.currentTimeMillis();
          //System.out.println("Start: " + start);
          g2.setPaint(this.paint);
  
          // if the axes use a linear scale, you can uncomment the code below and
          // switch to the alternative transX/transY calculation inside the loop
          // that follows - it is a little bit faster then.
          //
          // int xx = (int) dataArea.getMinX();
          // int ww = (int) dataArea.getWidth();
          // int yy = (int) dataArea.getMaxY();
          // int hh = (int) dataArea.getHeight();
          // double domainMin = this.domainAxis.getLowerBound();
          // double domainLength = this.domainAxis.getUpperBound() - domainMin;
          // double rangeMin = this.rangeAxis.getLowerBound();
          // double rangeLength = this.rangeAxis.getUpperBound() - rangeMin;
  
          if (this.data != null) {
              for (int i = 0; i < this.data[0].length; i++) {
                  float x = this.data[0][i];
                  float y = this.data[1][i];
  
                  //int transX = (int) (xx + ww * (x - domainMin) / domainLength);
                  //int transY = (int) (yy - hh * (y - rangeMin) / rangeLength);
                  int transX = (int) this.domainAxis.valueToJava2D(x, dataArea,
                          RectangleEdge.BOTTOM);
                  int transY = (int) this.rangeAxis.valueToJava2D(y, dataArea,
                          RectangleEdge.LEFT);
                  g2.fillRect(transX, transY, 1, 1);
              }
          }
          //long finish = System.currentTimeMillis();
          //System.out.println("Finish: " + finish);
          //System.out.println("Time: " + (finish - start));
  
      }
  
      /**
       * Draws the gridlines for the plot, if they are visible.
       *
       * @param g2  the graphics device.
       * @param dataArea  the data area.
       * @param ticks  the ticks.
       */
      protected void drawDomainGridlines(Graphics2D g2, Rectangle2D dataArea,
                                         List<ValueTick> ticks) {
  
          // draw the domain grid lines, if the flag says they're visible...
          if (isDomainGridlinesVisible()) {
              for (ValueTick tick : ticks) {
                  double v = this.domainAxis.valueToJava2D(tick.getValue(),
                          dataArea, RectangleEdge.BOTTOM);
                  Line2D line = new Line2D.Double(v, dataArea.getMinY(), v,
                          dataArea.getMaxY());
                  g2.setPaint(getDomainGridlinePaint());
                  g2.setStroke(getDomainGridlineStroke());
                  g2.draw(line);
              }
          }
      }
  
      /**
       * Draws the gridlines for the plot, if they are visible.
       *
       * @param g2  the graphics device.
       * @param dataArea  the data area.
       * @param ticks  the ticks.
       */
      protected void drawRangeGridlines(Graphics2D g2, Rectangle2D dataArea,
                                        List<ValueTick> ticks) {
  
          // draw the range grid lines, if the flag says they're visible...
          if (isRangeGridlinesVisible()) {
              for (ValueTick tick : ticks) {
                  double v = this.rangeAxis.valueToJava2D(tick.getValue(),
                          dataArea, RectangleEdge.LEFT);
                  Line2D line = new Line2D.Double(dataArea.getMinX(), v,
                          dataArea.getMaxX(), v);
                  g2.setPaint(getRangeGridlinePaint());
                  g2.setStroke(getRangeGridlineStroke());
                  g2.draw(line);
              }
          }
  
      }
  
      /**
       * Returns the range of data values to be plotted along the axis, or
       * <code>null</code> if the specified axis isn't the domain axis or the
       * range axis for the plot.
       *
       * @param axis  the axis (<code>null</code> permitted).
       *
       * @return The range (possibly <code>null</code>).
       */
      @Override
      public Range getDataRange(ValueAxis axis) {
          Range result = null;
          if (axis == this.domainAxis) {
              result = this.xDataRange;
          }
          else if (axis == this.rangeAxis) {
              result = this.yDataRange;
          }
          return result;
      }
  
      /**
       * Calculates the X data range.
       *
       * @param data  the data (<code>null</code> permitted).
       *
       * @return The range.
       */
      private Range calculateXDataRange(float[][] data) {
  
          Range result = null;
  
          if (data != null) {
              float lowest = Float.POSITIVE_INFINITY;
              float highest = Float.NEGATIVE_INFINITY;
              for (int i = 0; i < data[0].length; i++) {
                  float v = data[0][i];
                  if (v < lowest) {
                      lowest = v;
                  }
                  if (v > highest) {
                      highest = v;
                  }
              }
              if (lowest <= highest) {
                  result = new Range(lowest, highest);
              }
          }
  
          return result;
  
      }
  
      /**
       * Calculates the Y data range.
       *
       * @param data  the data (<code>null</code> permitted).
       *
       * @return The range.
       */
      private Range calculateYDataRange(float[][] data) {
  
          Range result = null;
          if (data != null) {
              float lowest = Float.POSITIVE_INFINITY;
              float highest = Float.NEGATIVE_INFINITY;
              for (int i = 0; i < data[0].length; i++) {
                  float v = data[1][i];
                  if (v < lowest) {
                      lowest = v;
                  }
                  if (v > highest) {
                      highest = v;
                  }
              }
              if (lowest <= highest) {
                  result = new Range(lowest, highest);
              }
          }
          return result;
  
      }
  
      /**
       * Multiplies the range on the domain axis by the specified factor.
       *
       * @param factor  the zoom factor.
       * @param info  the plot rendering info.
       * @param source  the source point.
       */
      @Override
      public void zoomDomainAxes(double factor, PlotRenderingInfo info,
                                 Point2D source) {
          this.domainAxis.resizeRange(factor);
      }
  
      /**
       * Multiplies the range on the domain axis by the specified factor.
       *
       * @param factor  the zoom factor.
       * @param info  the plot rendering info.
       * @param source  the source point (in Java2D space).
       * @param useAnchor  use source point as zoom anchor?
       *
       * @see #zoomRangeAxes(double, PlotRenderingInfo, Point2D, boolean)
       *
       * @since 1.0.7
       */
      @Override
      public void zoomDomainAxes(double factor, PlotRenderingInfo info,
                                 Point2D source, boolean useAnchor) {
  
          if (useAnchor) {
              // get the source coordinate - this plot has always a VERTICAL
              // orientation
              double sourceX = source.getX();
              double anchorX = this.domainAxis.java2DToValue(sourceX,
                      info.getDataArea(), RectangleEdge.BOTTOM);
              this.domainAxis.resizeRange2(factor, anchorX);
          }
          else {
              this.domainAxis.resizeRange(factor);
          }
  
      }
  
      /**
       * Zooms in on the domain axes.
       *
       * @param lowerPercent  the new lower bound as a percentage of the current
       *                      range.
       * @param upperPercent  the new upper bound as a percentage of the current
       *                      range.
       * @param info  the plot rendering info.
       * @param source  the source point.
       */
      @Override
      public void zoomDomainAxes(double lowerPercent, double upperPercent,
                                 PlotRenderingInfo info, Point2D source) {
          this.domainAxis.zoomRange(lowerPercent, upperPercent);
      }
  
      /**
       * Multiplies the range on the range axis/axes by the specified factor.
       *
       * @param factor  the zoom factor.
       * @param info  the plot rendering info.
       * @param source  the source point.
       */
      @Override
      public void zoomRangeAxes(double factor,
                                PlotRenderingInfo info, Point2D source) {
          this.rangeAxis.resizeRange(factor);
      }
  
      /**
       * Multiplies the range on the range axis by the specified factor.
       *
       * @param factor  the zoom factor.
       * @param info  the plot rendering info.
       * @param source  the source point (in Java2D space).
       * @param useAnchor  use source point as zoom anchor?
       *
       * @see #zoomDomainAxes(double, PlotRenderingInfo, Point2D, boolean)
       *
       * @since 1.0.7
       */
      @Override
      public void zoomRangeAxes(double factor, PlotRenderingInfo info,
                                Point2D source, boolean useAnchor) {
  
          if (useAnchor) {
              // get the source coordinate - this plot has always a VERTICAL
              // orientation
              double sourceY = source.getY();
              double anchorY = this.rangeAxis.java2DToValue(sourceY,
                      info.getDataArea(), RectangleEdge.LEFT);
              this.rangeAxis.resizeRange2(factor, anchorY);
          }
          else {
              this.rangeAxis.resizeRange(factor);
          }
  
      }
  
      /**
       * Zooms in on the range axes.
       *
       * @param lowerPercent  the new lower bound as a percentage of the current
       *                      range.
       * @param upperPercent  the new upper bound as a percentage of the current
       *                      range.
       * @param info  the plot rendering info.
       * @param source  the source point.
       */
      @Override
      public void zoomRangeAxes(double lowerPercent, double upperPercent,
                                PlotRenderingInfo info, Point2D source) {
          this.rangeAxis.zoomRange(lowerPercent, upperPercent);
      }
  
      /**
       * Returns <code>true</code>.
       *
       * @return A boolean.
       */
      @Override
      public boolean isDomainZoomable() {
          return true;
      }
  
      /**
       * Returns <code>true</code>.
       *
       * @return A boolean.
       */
      @Override
      public boolean isRangeZoomable() {
          return true;
      }
  
      /**
       * Returns <code>true</code> if panning is enabled for the domain axes,
       * and <code>false</code> otherwise.
       *
       * @return A boolean.
       *
       * @since 1.0.13
       */
      @Override
      public boolean isDomainPannable() {
          return this.domainPannable;
      }
  
      /**
       * Sets the flag that enables or disables panning of the plot along the
       * domain axes.
       *
       * @param pannable  the new flag value.
       *
       * @since 1.0.13
       */
      public void setDomainPannable(boolean pannable) {
          this.domainPannable = pannable;
      }
  
      /**
       * Returns <code>true</code> if panning is enabled for the range axes,
       * and <code>false</code> otherwise.
       *
       * @return A boolean.
       *
       * @since 1.0.13
       */
      @Override
      public boolean isRangePannable() {
          return this.rangePannable;
      }
  
      /**
       * Sets the flag that enables or disables panning of the plot along
       * the range axes.
       *
       * @param pannable  the new flag value.
       *
       * @since 1.0.13
       */
      public void setRangePannable(boolean pannable) {
          this.rangePannable = pannable;
      }
  
      /**
       * Pans the domain axes by the specified percentage.
       *
       * @param percent  the distance to pan (as a percentage of the axis length).
       * @param info the plot info
       * @param source the source point where the pan action started.
       *
       * @since 1.0.13
       */
      @Override
      public void panDomainAxes(double percent, PlotRenderingInfo info,
              Point2D source) {
          if (!isDomainPannable() || this.domainAxis == null) {
              return;
          }
          double length = this.domainAxis.getRange().getLength();
          double adj = -percent * length;
          if (this.domainAxis.isInverted()) {
              adj = -adj;
          }
          this.domainAxis.setRange(this.domainAxis.getLowerBound() + adj,
                  this.domainAxis.getUpperBound() + adj);
      }
  
      /**
       * Pans the range axes by the specified percentage.
       *
       * @param percent  the distance to pan (as a percentage of the axis length).
       * @param info the plot info
       * @param source the source point where the pan action started.
       *
       * @since 1.0.13
       */
      @Override
      public void panRangeAxes(double percent, PlotRenderingInfo info,
              Point2D source) {
          if (!isRangePannable() || this.rangeAxis == null) {
              return;
          }
          double length = this.rangeAxis.getRange().getLength();
          double adj = percent * length;
          if (this.rangeAxis.isInverted()) {
              adj = -adj;
          }
          this.rangeAxis.setRange(this.rangeAxis.getLowerBound() + adj,
                  this.rangeAxis.getUpperBound() + adj);
      }
  
      /**
       * Tests an arbitrary object for equality with this plot.  Note that
       * <code>FastScatterPlot</code> carries its data around with it (rather
       * than referencing a dataset), and the data is included in the
       * equality test.
       *
       * @param obj  the object (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!super.equals(obj)) {
              return false;
          }
          if (!(obj instanceof FastScatterPlot)) {
              return false;
          }
          FastScatterPlot that = (FastScatterPlot) obj;
          if (this.domainPannable != that.domainPannable) {
              return false;
          }
          if (this.rangePannable != that.rangePannable) {
              return false;
          }
          if (!ArrayUtilities.equal(this.data, that.data)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.domainAxis, that.domainAxis)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.rangeAxis, that.rangeAxis)) {
              return false;
          }
          if (!PaintUtilities.equal(this.paint, that.paint)) {
              return false;
          }
          if (this.domainGridlinesVisible != that.domainGridlinesVisible) {
              return false;
          }
          if (!PaintUtilities.equal(this.domainGridlinePaint,
                  that.domainGridlinePaint)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.domainGridlineStroke,
                  that.domainGridlineStroke)) {
              return false;
          }
          if (!this.rangeGridlinesVisible == that.rangeGridlinesVisible) {
              return false;
          }
          if (!PaintUtilities.equal(this.rangeGridlinePaint,
                  that.rangeGridlinePaint)) {
              return false;
          }
          if (!ObjectUtilities.equal(this.rangeGridlineStroke,
                  that.rangeGridlineStroke)) {
              return false;
          }
          return true;
      }
  
      /**
       * Returns a clone of the plot.
       *
       * @return A clone.
       *
       * @throws CloneNotSupportedException if some component of the plot does
       *                                    not support cloning.
       */
      @Override
      public Object clone() throws CloneNotSupportedException {
  
          FastScatterPlot clone = (FastScatterPlot) super.clone();
          if (this.data != null) {
              clone.data = ArrayUtilities.clone(this.data);
          }
          if (this.domainAxis != null) {
              clone.domainAxis = (ValueAxis) this.domainAxis.clone();
              clone.domainAxis.setPlot(clone);
              clone.domainAxis.addChangeListener(clone);
          }
          if (this.rangeAxis != null) {
              clone.rangeAxis = (ValueAxis) this.rangeAxis.clone();
              clone.rangeAxis.setPlot(clone);
              clone.rangeAxis.addChangeListener(clone);
          }
          return clone;
  
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the output stream.
       *
       * @throws IOException  if there is an I/O error.
       */
      private void writeObject(ObjectOutputStream stream) throws IOException {
          stream.defaultWriteObject();
          SerialUtilities.writePaint(this.paint, stream);
          SerialUtilities.writeStroke(this.domainGridlineStroke, stream);
          SerialUtilities.writePaint(this.domainGridlinePaint, stream);
          SerialUtilities.writeStroke(this.rangeGridlineStroke, stream);
          SerialUtilities.writePaint(this.rangeGridlinePaint, stream);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the input stream.
       *
       * @throws IOException  if there is an I/O error.
       * @throws ClassNotFoundException  if there is a classpath problem.
       */
      private void readObject(ObjectInputStream stream)
              throws IOException, ClassNotFoundException {
          stream.defaultReadObject();
  
          this.paint = SerialUtilities.readPaint(stream);
          this.domainGridlineStroke = SerialUtilities.readStroke(stream);
          this.domainGridlinePaint = SerialUtilities.readPaint(stream);
  
          this.rangeGridlineStroke = SerialUtilities.readStroke(stream);
          this.rangeGridlinePaint = SerialUtilities.readPaint(stream);
  
          if (this.domainAxis != null) {
              this.domainAxis.addChangeListener(this);
          }
  
          if (this.rangeAxis != null) {
              this.rangeAxis.addChangeListener(this);
          }
      }
  
  }
  